Improvement in belt-tighteners



- 9 JJALBERTSONI & D. W. MARMON- improvement in Belt Tighteners.

No 122,345 Patented Jan; 2,-1872.

ENT- JAMES ALBERTSON AND DANIEL W. MARMON, OF RICHMOND,- INDIANA.

IMPROVEMENT IN BELT-TIGHTENERS.

Specification forming part of Letters Patent No. 122,345, dated January 2, 1872.

Specification describing a certain Improvement in Belt-Tighteners, invented by JAMES ALBERTSON and DANIEL W. MARMON, of Richmond, in the county of Wayne and State of Indiana.

In grinding-mills which have their drivingpulleys upon vertical spindles, and in various other kinds of machinery where the pulleys which give motion thereto are similarly arranged, it becomes "necessary to provide a suitable receptacle for the belt to rest upon-when it has been loosened from its contact with the pulleys around which it passes, and to so arrange this receptacle that the belt shall be held in such a position that upon the application of the bclt-tightener the machinery may be at once put in motion; and it is indispensable for the preservation of the belt that-when it is in use its lower edge should be kept clear from contact with the shelf upon which it rests while idle. To secure the result just named is the object of our present invention, which con sists in the construction, combination, and arrangement of the parts of which it is composed, substantially in the manner shown, as a-conse'quence of which a belt which has been loosened from two vertical pulleys and allowed to drop upon a shelf or table may be pressed upon by a roller and thus brought in contact with such pulleys, and, so soon as it begins to move, be raised up from the shelf, so that it's under edge shall be free fromcontacttherewith, as will be more fully set forth hereinafter.

Figure l is a top view of our improved ti ghtener, the upper portion of the frame-work being removed to show the pulleys around which the belt passes, the shelf upon which it rests when not in use, and the mechanism for tightening the same. Fig. 2 is a side elevation of the device, showing the frame-work which holds the parts in position, the belt uponthe pulleys, the tighteningroller, the frame which carries it, and the mechanism for adjusting said frame. Fig. 3 is a view showing a portion of the frame-work and the clamp or frame to which the vibrating bar or framewhich carries the roller is attached.

Oorrespondin g letters refer to corresponding parts in the several figures.

In constructing. the parts of this device which constitute our invention a frame of metal such as is shown at E is provided, and

secured to any convenient vertical support. This frame is to be provided with slots, as shown at Fig. 3, so that the bolts which secure it to the vertical support may have play in it,

in order that it may be set at a slight angle to down through them for the purpose of forming a pivotal point upon which the bar or frame which carries the tightening-pulley turns, the frame Eturning on thestud e. To the upper end of the bolt or pin F an eyebolt, G, or other equivalent device is attached, while over its lower enda plate of metal, G is passed, which plate is attached to the swinging bar H, upon the top of which a bracket of metal, G is secured, and through the upwardly-projecting flanges of which the eyebolt passes, and in which it is secured by nuts. The parts last described form a joint, by which the lever H is hinged to any suitable post or support, thus allowing the outer end of this swinging lever to have a sufficient range of motionto cause the pulley H which it carries to act upon and tighten the belt. The end of lever H to which the tightening-pulley'is secured is bifurcated or otherwise prepared for the reception of the pulley, and may have attached to it a yoke,

H for guiding the belt. Near the outer end of the swinging lever HJthere is attached a plate of metal, H or other suitable device for attaching to the lever a rope or ropes or a chain, 1 I, for the purpose of opera-ting the tightener. One of these ropes or chains is fastened to one side of the lever H, and leads placed at any suitable point to receive it. Up- .on the shaft K there is a hand-wheel or other suitable device for giving a rotary motion to the shaft, so that when the belt has been slackened and permitted to fall upon the table or platform, if the shaft K is rotated the rope or chain leading from it to the swinging lever 11* will bring the pulley H in contact with the ing the nuts upon the eyebolt G, they being turned toward the frame E for raising it and away from it for loosening it.

What we claim as our invention, and desire to secure by Letters Patent, is

1. The combination and arrangement of the frame E, bolt or pin F, eyebolt G, and lever or frame H,the parts being constructed and arranged substantially as shown and described, for the purpose of allowing the tightening-pulley to be set at an angle to the surface of the belt and of furnishing the means for raising and lowering the outer end. of the leveror frame.

2. We claim the combination of the lever or frame H, weight I, ropes or chains 1, and shaft K, substantially as and for the purpose set forth.

In testimony of which invention we have hereunto set our hands.

JAMES ALBERTSON DANIEL W. MARMON.

Witnesses:

JAMES SPEER,

' ADmsoN H. NORDYKE. 8 7} 

